Bead runner



March 8, 1938. M. F. PRANGLEY 2,110,401

BEAD RUNNER Filed March 25, 1937 I I f WI II I v .syg

Attorneys Patented Mar. 8, 1938 PATENT OFFIQE BEAD RUNNER Marshall F. Prangley, Transvaal,

Africa Application March 25,

1 Claim.

My invention relates generally to means for moulding and finishing beads on plaster walls and the like plastic material objects, and particularly toa bead runner for moulding and finishing a bead on a plaster wall, and an important object of my invention is to provide means of the character indicated which enables the production and finishing of beads with large savings in time and materials.

Other important objects. of my invention will be apparent from a reading of the following description in connection with the drawing, wherein for purposes of illustration I have shown preferred embodiments of my invention.

In the drawing:-

Figure 1 is an elevational view of the lower part of a plaster wall showing an embodiment of the invention in operative relation thereto and in process of moulding and finishing a bead on the wall.

Figure 2 is a bottom plan view of the bead runner.

Figure 3 is a transverse vertical sectional view taken through Figure 2 approximately on the line 3-3.

Figures 4 and 5 are views similar to Figure 3 of runners with modified bead forming elements.

Referring in detail to the drawing, the numeral 5 generally designates the bead runner which is conveniently in the form of a flat block 6 provided with a U-shaped handle 1 whose legs are attached to or integral with the opposite ends of the block at the longitudinal center thereof and immediately over the wedge-shaped longitudinal groove 8 which is formed in the flat plain bottom 9 of the block 6, and in which is set the bead forming element It which is shaped on its underside with a groove formation II which may be varied to give desired contours to the bead l2 on 40 the wall 53.

The embodiments of my invention shown in Figures 4 and 5 are similar in all respects to the embodiment shown in Figure 3 except that the bead forming elements Ida and 10b thereof have different groove forming contours Ha and Nb, respectively.

In operating the device of the invention for purposes of producing the finished bead l2, the

Union of South 1937, Serial No. 133,056

wall is plastered and a groove is left in the plaster at the required height from the floor. A running rule I 4 is then nailed as indicated by the numeral I5 to the wall at the bottom of the groove l6, and on this rule the device 5 is manually moved so as to form and finish by moulding and pressure and friction a filling composed preferably of fine sand, cement, and plaster of Paris. After the filling has been placed in the groove the tool is applied to the running rule and run along the full length of the head to be constructed. It is only necessary to pass the tool three times along the work usually to produce a finished bead, and to produce a head which has fine clear cut top and bottom boundaries.

In the case of the embodiment of the invention shown in Figure 4, the effect of a double bead is available whereas the embodiment of the invention shown in Figure 3 produces a single broad bead. The embodiment of the invention shown in Figure 5 makes available a concave bead with outstanding borders. Any desirable contour of bead may be provided for by correspondingly shaping the bead forming element.

Although I have shown and described herein preferred embodiments of my invention, it is to be definitely understood that I do not desire to limit the application of the invention thereto, and any change or changes may be made in the materials, and in the structure and arrangement ,of the parts, within the spirit of the invention and the scope of the subjoined claim.

What is claimed is:-

A bead forming tool of the class described comprising a rectangular shaped block, a handle connected to one face thereof, the other face being flat and the flat face having a groove in its central portion extending from one end of the block to the other end, the groove being of dovetail shape in cross section and a bead forming member having a dovetail shaped part slidably arranged in the groove, with the bead forming portion projecting from the said face of the block and the side edges of the block being straight and spaced considerable distances from the bead forming member.

MARSHALL F. PRANGLEY. 

